Walking aid base



FIG. 1 is a perspective view of a walking aid base shown with one sample flower;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a cross-sectional view of the walking aid base taken along line 6-6 of FIG. 2.

The broken lines depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a walking aid base, as shown and described. 